A guanidine salt used as a buffering ingredient, notably in hair relaxers.
What it is
Guanidine carbonate is the salt of guanidine, a strongly basic nitrogen compound, with carbonic acid. CosIng lists it as a buffering and skin-conditioning ingredient.
Where it is used
Found in a small number of products, such as hair relaxers.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The label does not show the concentration actually used.
Functions
- Buffering
- Stabilising the pH of an aqueous medium in a narrow range even if an acid or base is added. Altering and/or maintaining a cosmetic product's pH at the desired level.
- Skin conditioning
- Maintaining the skin in good condition.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.